EP 0392085 B1 19920415 - DEVICE FOR MEASURING THE TRACK-DEVIATION OF A MOVING FOIL WEB
Title (en)
DEVICE FOR MEASURING THE TRACK-DEVIATION OF A MOVING FOIL WEB
Publication
Application
Priority
CH 138189 A 19890412
Abstract (en)
[origin: CA2011146A1] 21 ARRANGEMENT FOR MEASURING A DEVIATION FROM ITS LINE OF A MOVABLE WEB OF FOIL The arrangement comprises a tracking sensor with a light source, an optical means and a receiver with two photosensitive detectors, as well as a measuring apparatus with a computing unit. The optical means focuses light to provide a beam which falls on a moving web of foil. The tracking sensor may, for example, be installed in a re-winding installation, and during re-winding of the web, senses by means of the beam a marking track which is embossed in the web in the longitudinal direction of the web and which is composed of two different diffraction grating tracks. Each diffraction grating track projects the light diffracted therefrom in a predetermined direction of incidence to a respective detector. The sensed signals supplied by the receiver are converted into a difference signal by the measuring apparatus, and processed to provide correction signals which are supplied to a control means of the re-winding installation in order to compensate for lateral deviation of the moving web of foil.
[origin: CA2011146A1] The arrangement comprises a tracking sensor with a light source, an optical means and a receiver with two photosensitive detectors, as well as a measuring apparatus with a computing unit. The optical means focuses light to provide a beam which falls on a moving web of foil. The tracking sensor may, for example, be installed in a re-winding installation, and during re-winding of the web, senses by means of the beam a marking track which is embossed in the web in the longitudinal direction of the web and which is composed of two different diffraction grating tracks. Each diffraction grating track projects the light diffracted therefrom in a predetermined direction of incidence to a respective detector. The sensed signals supplied by the receiver are converted into a difference signal by the measuring apparatus, and processed to provide correction signals which are supplied to a control means of the re-winding installation in order to compensate for lateral deviation of the moving web of foil.
IPC 1-7
IPC 8 full level
G01B 11/00 (2006.01); B65H 23/02 (2006.01); G01B 11/04 (2006.01); G01D 5/34 (2006.01); G01D 5/38 (2006.01)
CPC (source: EP US)
B65H 23/0216 (2013.01 - EP US); G01D 5/342 (2013.01 - EP US); G01D 5/38 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0392085 A1 19901017; EP 0392085 B1 19920415; AT E75038 T1 19920515; CA 2011146 A1 19901012; CA 2011146 C 20011016; DE 58901190 D1 19920521; FI 901835 A0 19900411; JP 2865790 B2 19990308; JP H02284008 A 19901121; NO 901671 D0 19900411; NO 901671 L 19901015; US 5047651 A 19910910
DOCDB simple family (application)
EP 89122169 A 19891201; AT 89122169 T 19891201; CA 2011146 A 19900228; DE 58901190 T 19891201; FI 901835 A 19900411; JP 8841990 A 19900404; NO 901671 A 19900411; US 49994990 A 19900327